Molding-machine.



N0. 70|,772 Patented Jun 3, I902 J. STUART.

MOLDING MACHINE.

(Application filed June.26, 1901.)

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No. 701,772. Patented June 3, I902.

' J. STUART.

MOLDING MACHINE.

- (Application filed Jugs 26, 1901.) (No Model.) 3 SheetsSheet 2.

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N0 71' 772 Patented-lune 3, I902.

" J. STUART.

MOLDlNG MACHINE.

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ments in machines for UNITED ST TES V PATENT OFFICE.

JOSEPH STUART, oEwI MINeroN, DELAWAR ASSIGNOR TO LoB'DE'LI CAR WHEEL COMPANY, OF WILMINGTON, DELAWARE, A CORPORA- TIO N OF DELAWARE.

MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 701,772, dated June 3, 1902.

Application filed June 26, 1901.

To all whom it may concern:

Be it known that I, JOSEPH STUART, a cilizen of the United States, and a resident of Wilmington, Delaware, have invented certain Im-- provements in Molding-Machines, of which the following is a specification.

My invention relates to certain improve= v V pressing molds used in the process of casting.

The-main object of my invention ism so construct a press that the proper pressure can be applied to the mold. I

A further object of the invention is to so construct the machine that the molds canbe readily placed in position tobe pressed; and a still further object of the invention isv to make the Inachineportable', so that it can he used on any part of the molding-floor.

In the accompanying drawings, Figure 1 is a side view of my improved molding-press. Fig. 2 is a front view, partly in section; and Fig. 3 is a plan view.

Ais the frame of the machine, having bearings a at for the axles a, on which are the supporting 'wheels (1 These wheels are arranged to travel on a track; but the track may be dispensed with in some instances.

One or more levers C may be provided for moving the machine from one part of a building to another. This lever in the present instance has a pawl c, pivoted at c, engaging ratchet-teeth c of one of the wheels a The lever O is pivoted to one of the axles a. By shifting the pawl the machine can be moved either forward or backward.

A is a table for the carriage B, which carries the flask D of the mold when pressure is applied to the mold.

Extending from each side of the table A are beams E'E, forming rails upon which the carriage B travels. The carriage is provided with wheels I) b, Fig. 1, and has a deep flange b, as shown," so'that when pressure is applied the flange will rest' upon th'e table A and the wheels and their'axles' will be relieved from pressure. l

V I. I

In the present instance I have shown two carriages B B, one for the cope and the other for the drag of the mold, so that while one part of the mold is being pressed the other Serial No. 66,132. (No model.)

part can be prepared ready to be placed in position to be pressed as soon as the other part is removed, although in some instances the beams may extend only on one side of themachine, in which case only one carriage will be used.

Pivoted to the upper portion of the frame A atfis a lever F. The trunnion of this lever is of such a size as to withstand the strain frame and its trunnions ff willbe'lnoiinted in suitable bearings a on each side.

Pivoted at g to a bracketAflprojecting from the rear of the frame A, is a cylinder G,

in which travels a piston connected to a rod 9, which is pivoted at g to th'ei' long arm of the lever F. The valve G is arranged in the supply-pipe g and controls the admission to an'd'exhaust from the cylinder of fluid'under pressure. p -I-is a presser-plate 'ofi'snffi ient size to cover the mold, and this plate is'hu'ng from the short arm of the lever F by links assume when fluid under pressure is admitted to the cylinder G the long arm of the lever F will be raised and the short arm and its presserplate I will be lowered in contact with the upon portion of the mold D, and the presserplate will compress the sand or other material within the mold. Inorder to relieve the wheels from the extreme pressure necessary -to compress the sand within the mold, I pro- :vide a cylinder J, preferably directly under the center of the table A, and within this cylinder J is a plunger K, having at its upper end a flanged frame K, the flanges of which aline with the beams E, so that when the carriage B is moved to a point directly above the table A the wheels I) b of theca'rriage will rest upon the flanges oi ;the frame K. Fluid from a source of supply and under siltficient pressure is admitted to the under side of the plunger K in the cylinderJ tosupport the carriage and the mold under normal conditions; but as soon as the fluid under pressure is admitted to the cylinder G, causing the presser-plate l to press the mold, then The 1e this additional pressure upon the plunger K will cause the same, as well as its connected parts, to be lowered, and the flange Z) of the carriage B will then rest directly upon the table A, relieving the wheels and their axles from the pressure, so that the mold can be compressed between the table A and the presser-plate I. The mold I prefer to use is one in which the upper portion is movable, so that when the pressure is applied the sand within the mold is not only condensed, but the movable portion is pressed into the fixed portion of the mold. By this means the mold can be filled very quickly with sand to the upper surface of the movable portion of the mold and when placed in the machine it can be pressed so that the sand will be of the density required.

The above-described mold forms the subject of a separate application for patent filed by Robert C. Tolmie, of even date herewith, and therefore need not be further described in this specification, as it forms no part of this present invention.

I claim as my invention- 1. The combination in a machine for pressing molds, of a main casting forming an integral frame, a carriage for a mold and a support for the same carried by said frame, a lever pivoted to the frame and extending through an upwardly-projecting portion of the main casting constituting the same, a presser-plate connected to the lever, a cylinder carried by the frame, and a piston in the cylinder connected to the lever with means for supplying fluid under pressure to the cylinder, substantially as described.

2. The combination of a frame having a table, a yielding support carried by said table, laterally-extending rails in line with said support, a carriage mounted on the rails and arranged to be moved onto the yielding support, and means for pressing the mold carried by the carriage, a portion of said carriage being over the table and constructed to engage a fixed portion of said table when pressure is applied to a mold, substantially as described.

3. The combination of a frame, a table, beams extending from said table, a carriage, wheels on said carriage arranged to travel on the beams, means for pressing the mold mounted on the frame, a cylinder under the table, a plunger in said cylinder, a frame carried by said plunger and arranged to support the wheels of the carriage, with means for supplying fluid to the cylinder, the fluid in said cylinder being under such pressure that during the process of pressing the mold the carriage will rest directly upon the table and relieve the wheels from pressure, substantially as described.

4. The combination of a frame, a table, beams extending on each side of the table, one or more carriages mounted on the beams, a cylinder pivoted to the frame, a lever also pivoted to the frame, a piston mounted within said cylinder and connected to the long arm of the lever, a presser-plate hung from the short arm of said lever, means for admitting fluid under pressure to the cylinder, said carriages having portions placed to rest upon the table independently of the supporting-frame when the machine is operated, substantially as described.

5. The combination of a frame, a table, beams carried by said table and extending from each side thereof and forming rails, one 7 or more carriages mounted on said rails and arranged to receive the mold to be pressed, a cylinder below the table, a plunger in said cylinder, a frame carried by said plunger and having flanges in line with the beams so that the carriage can be transferred from the beams onto the flanged frame, a lever pivoted to the upper end of the main frame of the machine, a presser-plate connected to the lever and mounted directly above the table, and means for operating the lever, substantially as described.

6. The combination of a frame, a table, a carriage, a support therefor yieldingly mounted on the table, means on the frame for pressing the mold on said carriage, the latterhaving portions placed to rest upon the table 'whereby it is carried independently of the support when the pressing means is operated, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOSEPH STUART.

Vitnesses:

WILL. A. BARR, Jos. I-I. KLEIN. 

